Ralph Manns

Jul 17, 2024 | in-fisherman.com | Rob Neumann |Steve Quinn |Hal Schramm |Ralph Manns

Invasive carp conjure up mental images of flying fish and hyperabundance. Millions are spent annually to control and curb the spread of black carp, silver carp, and bighead carp. Specifically, bigheaded carps (silver carp and bighead carp) are highly-publicized, abundant, and their impacts are well understood in established regions such as in the Mississippi River basin. In the Grand Lake/Neosho River system, invasive carp are in low abundance, and thus locating and removing them are difficult.

Jul 3, 2024 | in-fisherman.com | Rob Neumann |Steve Quinn |Hal Schramm |Ralph Manns

Sunlight drives photosynthesis, and oxygen is a product of that process. So is more oxygen found around and under floating vegetation than in nearby open water? Researchers at the University of Washington measured dissolved oxygen concentrations under and near thick mats of vegetation in two ponds.* In Bull Lake, mats of mixed coontail, milfoil, and Elodea produced high concentrations of dissolved oxy­gen at the surface (15 to 21 parts per milllion) during the day.

Apr 17, 2024 | in-fisherman.com | Rob Neumann |Steve Quinn |Hal Schramm |Ralph Manns

There’s a lot of chatter these days about live-imaging sonar (aka, live-scope, forward-facing sonar). Live-imaging sonar (LIS) has been quickly adopted by many crappie anglers; and there is concern among anglers, guides, and fishery managers that the increasingly common use of LIS may cause declines in crappie populations.

Mar 27, 2024 | in-fisherman.com | Rob Neumann |Steve Quinn |Hal Schramm |Ralph Manns

Angler harvest of walleyes has—although maybe based more on intuition than good science—always been a concern as evidenced by decades of length and possession limits. More anglers equipped with more knowledge, better tackle, and advanced marine electronics and declines of some walleye fisheries have increased concern about the effects of exploitation on walleye populations.

Mar 13, 2024 | in-fisherman.com | Rob Neumann |Steve Quinn |Hal Schramm |Ralph Manns

Largemouth bass capture–meaning ingest or get into their mouth–prey two ways: ram feeding and suction feeding. Ram feeding is overtaking prey with mouth open. Suction feeding is quickly opening the jaws and enlarging the mouth cavity by lowering the tissues on the bottom of the mouth to create negative pressure that sucks water and the prey into the mouth cavity. A single feeding event is rarely all ram or all suction.